Locomotive-furnace arch.



Patented May 4, 1915.

2 SHEETSSHEET l- C. E. MlLLER.

LOCOMOTWE FURNACE ARCH.

APPLICATION HLED SEPT. 13, 1912. 1,138,053. Patented May 4, 1915 2 SHEETS-SHEET 2.

UNITED $TATE Prilililiifii filii ili fiiflilla CHARLES E. MILLER. OF CHICAGO, ILLINOIS, jiSSIGNCR, BY MR NE ASSIG' .MERICAN AR(, CDIVKPANY, GI NE)? $03K. 12'. L, A COllPORATAOH OF 13E LOCOMOTIVE-FUENACE ARCH.

Specification of Lotters E Application filed September 122, i912. Serial No. T262398.

To all W171 on: it may. marry)? ,oY-xn that 1, tumm -Es E. llvirr (-itizv ot the United States, and a TB$ltlc1lil f Chirago, Cool; county, Illinois, have in ontml rertain now and useful Improveinonts in Loon'notivo-Furnaco Arches, of which the folly-ring is a specification.

My invention relates generally to improvenionts in holler furnaces of locomotivos. and relates more particularly to ior provcinonts in refractory battle walls or arches of the type adapted for locomotive boiler furnaces ezuiippedwith arch support in; tuhcs.

Tho object of in invention is to improve tho i'orm, arrangement, and construction of suvh arches tothr oml that the same can he built cheaply, installed easily, and mairr tainiul in Ltlioinnt working order with little attoi'ition.

Anotho ol. icct of my invention is to pro vide a sectional arch for locomotive fire boxes equippml with arch supporting tubes,

.hinzltion with a bafllo wall or aroh compris ing a plurality of side bricks resting upon the. outermost arch tubes and extending upwardly and outwardly into abutment with tho Sl(l( sheets; saiil bricks ha ring; upwardly aml mitwarilly inclined inner-end faces,zin l a pluralitv of bricks arranged upon the. in trrnu-(iiatc arch tubes and having complementary inrlinvd face-s resting upon the inriinml inner mlge faces of the side bucks:

and (on'iploting the closure between the sialc sheets.

My invention wil boniore readily un-iierstoml by reference t the accompanying t a. C hile with a Jr invun hiring; t-illltil on *Ho lino '1 is a crtiiai ;:-ction on the line Y--Y of Fig. I viewed in "the (lirociiion of the arrows; Pig. 3 in a farm; sec-- tional llstail of a fire box equipped with the arch of modified form, embodying my invention; Fig. 4 shows another form of locomotiro arch einhodving my invention 21ml Fi 5 and 6 are perspuct-ive viewsillustrating differont forms of ohlo shoet oluntinp; hrirks locomotive lire box as lii, o shown coniproe the flue sheet sioo'sheo 'l-Z-;, rear slnots l, and the cro n shoot '5. Tho. bottom of the firebox occupied by grate (l. The .ilUQS 7 extend forward from the upper part of the has u-et and c municato. in manner on known. with tho .sniolie box and stack at the it ot' the lot-on... lvo. The tire box ix by the l ilcr sheet 8, h is spared thorofroni to form the frontu title. and roar :ztor lo ll, 9', and 5) r0 spec-ti i'lnres To extend from the low part he pue sheet 2 to tho hoot, as; shown, to enter the line ohm-l. anal .roar iPtlat suhstantial right angles thoroto. Vi flows from the front water lop; $7 through tho tubes and into the roar Wat-i=1- lug fl", thou-b} prowl-ting the tlllKS from burning.

The "'wiilo" type of fire hoxr as: horo shown. is ezpiippotl with four arch tnheS. but it shouhl he understood that tlu number of tubes var) in thoililterent types of lire boxes. there lwially being a smaller hum-- her in tho narrow type than in. the wide type. In all types of fire boxes, however. the arch tuhes serve the same function. tho numbers tlwroof llellifl Cfll'lkil to accommodate brirh's, of convenient size and r. won-h is usualhl terminwl hr that r-ihiol'a can i i iiUOi of tho -nfeboz.

termed a front arch from its for the purpo.

enlist-err 1 fire box. The outer-mos tubes l0, 10, which I shall for convenience call the side tubes," spaced from the side sheet-s in this inst-once sligbtly more than the (ii l ctwecn any of t 0 oi the tubes. The between the cubes and side iii} oi? rciraciory :icai in form For side of the box. my rest upon the "'sidmtubes in a groove 11., provided.

. tin-:reior on the under side of the brick.

The distancebetwecn the center of groove 1'1 and the outer face 11 is slightly greater than the distance between the side sheet and the cube. This causes the bricks to take 11. slightly upward inclined position. The brick in this posit-ion obviousl wedges fiightly in the placebctwecn the tube and side sheet. The face 11 is made so that it is parallel to the side sheet when the brick occupies a. slightly 'upward inc-lined position. The distance between the side sheets and side tubes" often varies somewhat even in the some type'of fire box. The bricks 11, however, readily adjust themselves to the varying (listei'ice by taking difiercnt angular positidns,z inever'y instance forming a'tight joint, by

" virtue of their wc-dging position. The inner face 11 of the side brick is chamfercd or beveied: Thus I as will be seen in Fig. 2, the opposed side bricks 11 having their faces in c. ed toward the lower control part of the hrs box, form an opening therebetwecn 1mich-is wider at the top than at the bottom; or, in other words, forming a keystone shaped opening. This space is filled by a plurality of bricks 12 a nd'13 respectively. The row of bricks 13 shall bereferred to as 'ho cent-ml bricks the rows of bricks 12 as the intermediate bricks and the bricks 1:2 and 13 together as the body of the arch. it should be understood thatwith some very narrow type of boxes but one con tral row of bricks is necessary to complete 1e closure between the side bricks- The int-ermmiiiute uric-l 12 are provided with inclined outer face 12 for complementary engagement with the inclined face 11 of the bricks 11. This forms one. support. for the brick 1'2, rind t-h are of such width that the other end res upon one of the intcrme diets in tubes. The central space isclosed by the central bricks 13, which rest upon two of theintermedinte-arch tubes. Both the bricks i2 and 13 have chamfered edges 12 and 13? respectively. It shonid be seen that any slight variation in width of the spaced relation between opposite bricks ii, dueeither to the dist-encebetween the 'do. sheets or the distance hecwecn the side 2121. x be taken up by the body oi the arch. For instance, if the synced re i greater than thatshown. in the drnn I intermediate'bricks 19 will take lo position on the inclined face 11" spaced relation is less hen sh Y '1. drawings. the bricks will rise nyon the inclined. nice of the side bricks. 'iho chamiered edges 12", 13 0'1" the intermediate and bricks enables the incermedians bricks and. central bricks to take any angular position n ssa-ry to just the arch to the fire box dimensions.

My arch, becomes more rigid. with use; because the vibration of tho occmotivc as it travels wedges the side l 'into place between the side sheets and the side tubes and ciso Wedges the body of the arch more firmly into place between ihe side bricks. In my arch there is no danger of the .side bricks displacing the central or body bricks a side thrust, because the thrust is tnkenby the side tubes noon which do not depend upon the side bricks to lock the whole body 5 the arch into place, as do many who have hitherto devised locking arches, but on the contrary depend upon the side bricks only to Wedge themselves firmly place between the sidc'shcets and the side tubes and then the body of the arch by its Weight and nngmentcd by the 'vibra tion of the locomotive in use, wedges sccurcly into position between the side bricks. Any port-ion of the side sheet can be easily :gotten n6 for the purpose of inspection and repair by removing one of she intermediate bricks adjacent that poriion zkl'lfi then-rite moving the side brick= I have shown in Fig. 3 n. modified'i orm of arch wherein the side bricksll oi the same form as those described in rci'cronce to Fi gs. 1 and 2 and they rest upon the side tubes in like manner; The body oi the arch is composed of a plurality of bricks,

iii!

the supporting tubes. All of the bricks l5 torinin the body of the arch are of the some and contort-tuition. one row, howcver, being inverted. This l'nri'n of arch has the any .ntag of your... out two forms of brick, namely, the side brick and the center or body brick. The embodi ment of my invention shown in 1 and 2 has the advantage ofha ing each brick supported at least on one side by the rigid arch tube, while in the form just described some of theintermediate bricks rest entirely upon the other bricks.

In Fig. --l l ha e shown another embodiment of my invention \vl'icrcin the side l" 5361' are provided with inner faces 2L" 2.", which are concentric to the tubes. r be body bricks are of the same construction as those disclosed in Figs. 1 and 2. lhis form of arch is of advantage in that the body bricks more readily adjust them selves to the various angular positions necessary to complete the arch in boilers of slightly dillerent sizes, as well tireboxes wherein the spaced relation of the arch tubes varies slightly. One of the side sheets 3 is shown, greatly cxaggcatcd, spaced nearer the center than the other. It will there be noted how the side bricks close the space by taking a different angular position. The two forms of side bricks and their relation to the side arch tubes are well shown in Figs. 5 and (3 wherein the arch tubes arc indicated by dotted lines.

In. that cmbodimcnt of my invention shown in Figs. 1 and 2, .l have recessed the under portion of the bricks and it is obvious that the form shown in Figs. 3 and i may alsobo constructed oil recessed bricks. Such. bricks lighten the arch considerably'and also provide a plurality of pockets on the underside which aid in. the thorouglrcoinmingling of the and thereby effect more complete combustion.

My arch is adapted to be installed in the standard locomoti now in use which. are equipped with such supporting tubes, and in those not equipped with arch supporting tubes by providing same with a group of arch tubes.

Hy invention as herein embodied overcomes many of the-dcfects and objections to arc-hes now in use, as well as objections urged against those hitherto devised but not embodied in operative structures.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A locomotive boiler firebox or furnace in combination with a group of arch tubes arranged therein, the side tubes of which are spaced from the side sheets, sidebricks having one end only resting upon the adjacent side tube and extending into engagement with the side sheet, and an arch b0dyresting upon the spaced intermediate tubing and upon the said side bricks.

In a locomotive boiler firebox or furnace. the combination of a group of longitudinally extending archtubes laterally spaced in the firebox and of less width, upwardly inclined sidc bricks engaging the side tubes and abutting the side sheets, thereby closing the space between the side tubes and the side sheets. and an arch body substantially laterally coextensive with said group of arch tubes and resting upon the in-- nor faces of the side bricks and upon the intern'iecliate arch tubes thereby closing the space between the side l' ricks.

3. In a locmnotive boiler firebox, the com-- hination with its side s acts and front and rear sheets of a plurality of arch tubes extending froth the front sheet to the rear sheet and substantially equally spaced be tween the side sheets, side bricks having grooved under portions engaging the side tube, said brick occupying an upwardly inclined positidn between the side tube and the side sheet, and having an up\ 'ardly and outwardly inclined inner face. intermediate or body bricks having com 'ilemcntary inclined faces abutting the inclined inner faces of the side bricks, said body bricks closing the spaces between the side bricks.

4. In a locomotive boiler firebox, the combination with its side sheets and front andrcar sheets of a plurality of arch tubes ex tending from the front sheet tothe roar sheet and substantially equally spaced bctween the side sheets, a plurality of side bricks of slightly greater Width than the distancebetween the side tubes and side sheets resting upon the side arch tubes and wcdgingly abutting the side sheets, thereby closing the spaces between the side sheets and the side tubes, -iid side bricks havingportions extending inwardly from the side tubes, said portions being beveled to form a keystone shaped spare hetwcen'opposite side bricks a keystone-like body ortion comprising a plurality of bricks resting on the intermediate arch tubes and closing the space between the opposed side bricks by wedging abutment with the side bricks.

In a locomotive boiler firebox or furonce, the combination of a group of arch tubes laterally spaced therein, upwardly inclined side bricks abutting the side sheets and resting upon the side tubes, beveled inner faces on said side bricks within the confines of the side tubes, a body portion laterally slightly greater than the distance between the beveled faces of the opposed sidc bricks, said body portion having complementary beveled outer faces for engage- -mcnt with the inner beveled faces of the side bricks, as and for the purpose specified. 6. A locomotive boiler furnace having a group of arch tubes, in combination with a refractory arch resting upon 1 campi'ising inclined side riw the 'is tubes and abut Y said side bricks i'ci'ming like closure of 12s ai'ch tubes and a k. siightly reak tween the n, resting upon i351; sici die-lie arch tubes and space between the side LFlts 7. In a locomotive b arch fur Zines-math" boiler films-Rs rte-(i. by arch tuba and comprising supported by arch t bars at ziieii' inner iris and leaning against the side sheet of firebox at the-i5- ontcz ends, in cembinw on with intermediate bricks resting upon =rn1edi=1tc arch tubes, the outer ends of I bination of a pizubtjs spa-car intermediate bricks resting upon and from the Sid? s1 furnace \Vfiii lll i cn 21 121 the inner ends of the 7 a k 0 c:

side bricks. v

10. The herein described improvement in lmromctivc iii-eb0 arches, comprising a side in ck for such arches, said brick having its snfix Lu 1210 1 in substantiuiiy parallel min Licn to i'cspcctivciy a side sheet and be c: 3 by mmzhcr arch. brick, and said having an arch tubs gromsor i 5 under side 'paraiiei with and he and iliCil is ndg'ipized to engage icic, for the purposes described. In testin'mny,ivbemnf, I have hereunto set my h: n], this 9th day of September, 1912-, in the PL'CHi'flC U1" iwo subscribing witnesses.

CH.- RIJES E. MILLE Z.

cXtn-iing W ardly inclined .11 n tubes bricks resting u abuttiur the boii mac 5., and a J stone-iiiic arch bod; q-mnprising a. of bricks resting 1213011 the iuicrinci tube and the idc bric space therebe? .8. In a loconnmve b: bination of a gruup width than the 23min side comprising a pbimiity A 'zu m'ardiy outwardly extending bricks r sting :2 side tubes wedged, inf-(z p tube ancLside sheet 1'; edge on said sidebrick' i i-in side tubes, and a, bou a arch p01 less extensive than the :mzh extensive than the space ween 1 m side bricks, cbmpi-ising pizzmliiy mi in '7- pm the 

